An anonymous reader writes: FitMetrix, a fitness technology and performance tracking company owned by gym booking giant Mindbody, has exposed millions of user records because it left several of its servers without a password. The company builds fitness tracking software for gyms and group classes — like CrossFit and SoulCycle — that displays heart rate and other fitness metric information for interactive workouts. FitMetrix was acquired by gym and wellness scheduling service Mindbody earlier this year for $15.3 million, according to a government filing. Last week, a security researcher found three FitMetrix unprotected servers leaking customer data. It isn’t known how long the servers had been exposed, but the servers were indexed by Shodan, a search engine for open ports and databases, in September.

The servers included two of the same ElasticSearch instances and a storage server — all hosted on Amazon Web Service — yet none were protected by a password, allowing anyone who knew where to look to access the data on millions of users. Bob Diachenko, Hacken.io’s director of cyber risk research, found the databases containing 113.5 million records — though it’s not known how many users were directly affected. Each record contained a user’s name, gender, email address, phone numbers, profile photos, their primary workout location, emergency contacts and more. Many of the records were not fully complete.